OrganiCalc is an online web app that takes your Mehlich 3 soil test results and produces a set of recommended organic mineral amendments, tailored for your soil and chosen to balance your soil minerals and build a mineral reserve. This worksheet recommends only safe, organically approved minerals
OrganiCalc works for all soil types except calcareous, those with pH < 5.0, or those with extremely high levels of sodium, boron, manganese, copper or zinc. In order to run properly your soil sample depth should be 6″ (15 cm) or 7″ (18 cm). OrganiCalc easily accepts both Logan Labs and Spectrum Analytic Mehlich 3 test results.
At the bottom right corner of the first page is an icon; clicking it opens the second page. Please consider entering your email on the second page, and sending us your results. We spot-check the emailed recommendations, and will contact you if there are any further comments. Emailing us also generates a nice .pdf, if you need one, in addition to your “Print All” hardcopy. A sample pdf worksheet similar to the one we would email you can be viewed by clicking here.
The downloadable PDF file below includes general recommendations for Nitrogen, Trace Minerals, etc. and for amendment application.
The video User’s Guide with details of the features of OrganiCalc and a worked example is linked below.
This is a handy free online calculator we put together to make calculating the total area to be amended easy.
This the “the algorithm” that describes the inner workings of the OrganiCalc spreadsheet.